Defibrillator rentals in Baltimore, MD. ZOLL???s AED Plus is the only AED that can see your chest compressions and guide you to the correct rate and depth during CPR. Heartland Medical Sales and Service is a distributor of Used and Refurbished Defibrillator rentals in Baltimore, Columbia, Germantown, Silver Spring, Glen Burnie, Maryland. 1 Month Minimum Rental